{"id":898,"date":"2008-04-24T13:12:00","date_gmt":"2008-04-24T11:12:00","guid":{"rendered":"https:\/\/kids.esa.int\/mars_radar_pioneers_3d_views_of_planets\/"},"modified":"2026-10-08T00:33:31","modified_gmt":"2026-10-07T22:33:31","slug":"mars_radar_pioneers_3d_views_of_planets","status":"publish","type":"post","link":"https:\/\/kids.esa.int\/fi\/mars_radar_pioneers_3d_views_of_planets\/","title":{"rendered":"Marsin tutka avaa tien planeettojen 3D-n\u00e4kymille"},"content":{"rendered":"<div class=\"lede\">\n<p>Superman saattoi ehk\u00e4 n\u00e4hd\u00e4 seinien l\u00e4pi r\u00f6ntgenkatseellaan, mutta eurooppalaiset tutkijat ovat kehitt\u00e4neet viel\u00e4kin merkitt\u00e4v\u00e4mm\u00e4n kyvyn. ESA:n Mars Express -kiertoradalla olevan MARSIS-tutkan avulla he pystyv\u00e4t n\u00e4kem\u00e4\u00e4n useiden kilometrien paksuisen kiinte\u00e4n j\u00e4\u00e4n tai kiven l\u00e4pi.<\/p>\n<\/div>\n<p>Viel\u00e4 \u00e4skett\u00e4in oli mahdollista tutkia vain planeetan pintaa. Ainoa tapa saada tietoa maanalaisista olosuhteista oli laskeutua pinnalle ja aloittaa kaivaminen tai poraaminen. T\u00e4llaisilla menetelmill\u00e4 p\u00e4\u00e4stiin kuitenkin tutkimaan vain noin puolen metrin syvyyteen asti, ja ne riittiv\u00e4t vain yhden paikan tutkimiseen koko planeetalla.<\/p>\n<p>MARSIS, ensimm\u00e4inen toisen planeetan kiertoradalla toimiva tutka-anturi, on osoittanut, ett\u00e4 koko planeetan pinnan alle on mahdollista kurkistaa kiertoradalta k\u00e4sin. Nyt, kun MARSIS-tiimi ymm\u00e4rt\u00e4\u00e4 paremmin, mihin tutka-anturi pystyy, se on alkanut pohtia muiden aurinkokunnan kohteiden tutkimista.<\/p>\n<figure class=\"wp-block-image size-natural\" data-width=\"400\" data-credit=\"Jason Craig\/JPL\" data-detail-url=\"https:\/\/www.esa.int\/ESA_Multimedia\/Images\/2008\/04\/Radar_sounding_is_opening_up_a_planet_s_third_dimension2\" data-licence=\"ESA Standard Licence\" data-licence-url=\"https:\/\/www.esa.int\/ESA_Multimedia\/Terms_and_conditions_of_use_of_images_and_videos_available_on_the_esa_website\"><img decoding=\"async\" loading=\"lazy\" style=\"max-width:100%;height:auto\" src=\"https:\/\/www.esa.int\/var\/esa\/storage\/images\/esa_multimedia\/images\/2008\/04\/radar_sounding_is_opening_up_a_planet_s_third_dimension2\/17893129-2-eng-GB\/Radar_sounding_is_opening_up_a_planet_s_third_dimension.jpg\" alt=\"Radar sounding is opening up a planet\u2019s third dimension\"><figcaption>Tutkamittaus avaa planeetan kolmannen ulottuvuuden<\/figcaption><\/figure>\n<p>Jupiterin kuu Europa on yksi paikka, jossa MARSIS-tyyppinen koe voisi johtaa j\u00e4nnitt\u00e4viin l\u00f6yt\u00f6ihin. Europan paksun, j\u00e4isen kuoren alla uskotaan olevan valtameri (jossa on el\u00e4m\u00e4\u00e4?). Tutkalla voitaisiin my\u00f6s mitata Saturnuksen kuun Titanin hiilivetyj\u00e4rvien syvyyksi\u00e4. Sill\u00e4 voitaisiin my\u00f6s tutkia voimakkaita geysireit\u00e4, jotka purkautuvat avaruuteen Saturnuksen toiselta kuulta, Enceladukselta.<\/p>\n<p>Asteroidien ja komeettojen sis\u00e4osat voitaisiin tutkia perusteellisesti tutka-anturilla. T\u00e4\u00e4ll\u00e4 Maassa MARSIS-tekniikka voisi olla korvaamaton apu Etel\u00e4mantereen j\u00e4\u00e4peitteiden tutkimuksessa. Ensimm\u00e4ist\u00e4 kertaa on mahdollista tehd\u00e4 kolmiulotteisia tutkimuksia planeetoista ja kuista \u2013 tutkan l\u00e4pikatsauskyvyn ansiosta.<\/p>\n<figure class=\"wp-block-image size-natural\" data-width=\"400\" data-credit=\"ESA (Animation by AOES Medialab)\" data-detail-url=\"https:\/\/www.esa.int\/ESA_Multimedia\/Images\/2005\/11\/MARSIS_sending_signals_and_receiving_echoes2\" data-licence=\"ESA Standard Licence\" data-licence-url=\"https:\/\/www.esa.int\/ESA_Multimedia\/Terms_and_conditions_of_use_of_images_and_videos_available_on_the_esa_website\"><img decoding=\"async\" loading=\"lazy\" style=\"max-width:100%;height:auto\" src=\"https:\/\/www.esa.int\/var\/esa\/storage\/images\/esa_multimedia\/images\/2005\/11\/marsis_sending_signals_and_receiving_echoes2\/17890983-2-eng-GB\/MARSIS_sending_signals_and_receiving_echoes.jpg\" alt=\"MARSIS sending signals and receiving echoes\"><figcaption>MARSIS l\u00e4hett\u00e4\u00e4 signaaleja ja vastaanottaa kaikuja<\/figcaption><\/figure>","protected":false},"excerpt":{"rendered":"<p>Superman may have been able to see through walls with his X-ray vision, but European scientists have developed an even more remarkable ability. With the MARSIS radar sounder on ESA\u2019s [&hellip;]<\/p>\n","protected":false},"author":5,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"esa_banner_image":"https:\/\/www.esa.int\/var\/esa\/storage\/images\/esa_multimedia\/images\/2008\/04\/marsis_fully_deployed2\/17875888-2-eng-GB\/MARSIS_fully_deployed.jpg","esa_banner_description":"MARSIS fully deployed","esa_banner_credit":"ESA","esa_banner_licence":"ESA Standard Licence","esa_banner_detail_url":"https:\/\/www.esa.int\/ESA_Multimedia\/Images\/2008\/04\/MARSIS_fully_deployed2","esa_external_url":"","esa_external_new_window":false,"_jetpack_feature_clip_id":0,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_post_was_ever_published":true},"categories":[10,11,12],"tags":[],"panel":[],"language":[],"age":[],"duration":[],"resource_type":[],"audience":[],"wf_post_folders":[],"class_list":["post-898","post","type-post","status-publish","format-standard","hentry","category-learn","category-our-universe","category-planets-and-moons"],"jetpack_sharing_enabled":true,"jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/posts\/898","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/users\/5"}],"replies":[{"embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/comments?post=898"}],"version-history":[{"count":5,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/posts\/898\/revisions"}],"predecessor-version":[{"id":4728,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/posts\/898\/revisions\/4728"}],"wp:attachment":[{"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/media?parent=898"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/categories?post=898"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/tags?post=898"},{"taxonomy":"panel","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/panel?post=898"},{"taxonomy":"language","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/language?post=898"},{"taxonomy":"age","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/age?post=898"},{"taxonomy":"duration","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/duration?post=898"},{"taxonomy":"resource_type","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/resource_type?post=898"},{"taxonomy":"audience","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/audience?post=898"},{"taxonomy":"wf_post_folders","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/wf_post_folders?post=898"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}